A woman who was airlifted to hospital after being struck by a car in Two Mile Ash, Milton Keynes, has since died.
Thames Valley Police is appealing for witnesses following the fatal collision in Milton Keynes yesterday.
Officers were called to the V4 Watling Street at around 3.30pm after reports that a pedestrian had been involved in a collision with a black Hyundai Getz.
The 67-year-old pedestrian, who is from the Two Mile Ash area, was airlifted to the Walsgrave Hospital in Coventry for treatment to her injuries, but was pronounced dead a short time later.
The driver of the Hyundai, a 74-year-old man who is also from the local area, and a passenger in the vehicle were treated by paramedics at the scene for shock.
Thames Valley Police has allocated a family liaison officer to the investigation and an investigation has been launched into the circumstances around the incident.
South Central Ambulance Service (SCAS) were first on the scene but requested the attendance of a Warwickshire & Northamptonshire Air Ambulance (WNAA).
The crew left their base at Coventry Airport at around 3.45pm and landed on the road, adjacent to the incident, 17 minutes later.
The crew from WNAA assisted SCAS with treating the patient before immobilising her and airlifting her to University Hospitals Coventry & Warwickshire for further treatment.
Anyone who witnessed the collision, or who may have seen the vehicle involved in the collision prior to the incident, should contact Thames Valley Police via the 24-hour Enquiry Line on 101 and quote URN 910 1/5.